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LTC2418IGN データシート(PDF) 40 Page - Linear Technology

部品番号 LTC2418IGN
部品情報  8-/16-Channel 24-Bit No Latency TM ADCs
PDF  48 Pages
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メーカー  LINER [Linear Technology]
ホームページ  http://www.linear.com
Logo LINER - Linear Technology

LTC2418IGN データシート(HTML) 40 Page - Linear Technology

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LTC2414/LTC2418
40
241418fa
350
Ω
BRIDGE
0.1
µF
1
µF
15V
15V
–15V
38
14
7
4
13
12
11
10V
5V
15V
U1
LTC1043
6
2
7
4
7
4
–
+
REF+
REF–
CH0
CH1
GND
VCC
11
12
21
22
15
2410 F52
9
5V
LTC2414/
LTC2418
47
µF
0.1
µF
10V
+
17
5
15
6
18
3
2
U2
LTC1043
1
µF
FILM
8
14
7
4
13
12
11
*
*
*
5V
U2
LTC1043
17
–10V
–10V
LT1236-5
1k
33
Ω
Q1
2N3904
0.1
µF
15V
–15V
–15V
3
6
2
–
+
1k
33
Ω
–10V
10V
Q2
2N3906
*FLYING CAPACITORS ARE
1
µF FILM (MKP OR EQUIVALENT)
SEE LTC1043 DATA SHEET FOR
DETAILS ON UNUSED HALF OF U1
LTC1150
LTC1150
20
Ω
200
Ω
20
Ω
200
Ω
0.1
µF
10
µF
Figure 46. LTC1043 Provides Precise 4X Reference for Excitation Voltages
APPLICATIO S I FOR ATIO
The error associated with the 10V excitation would be
–80ppm. Hence, overall reference error could be as high
as 130ppm, the average of the two.
Figure 47 shows a similar scheme to provide excitation
using resistor arrays to produce precise gain. The circuit
is configured to provide 10V and –5V excitation to the
bridge, producing a common mode voltage at the input to
the LTC2414/LTC2418 of 2.5V, maximizing the AC input
range for applications where induced 60Hz could reach
amplitudes up to 2VRMS.



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